Oil burner



Feb. 10, 1953 H. J. HABERSTROH OIL. BURNER Filed April 14, 1950 Mw LALINVENTOR H995 EH r c//ffps 7770// Patented Feb. 10, -1953 y UNITEDSTATES PATENT OFFICE 2,628,131 OILBURNER Herbert J. Haberstroh, Bristol,Conn. Application April 14, 195o, serial No. 155,969

1 claim. (o1. 299-133) This invention relates to oil burners, and moreparticularly to an automatically adjustable, pressure responsive oilburner nozzle.

A main object of the invention is to provide an automatically adjustableoil burner nozzle which is simple in construction, dependable inoperation, and which veliminates the necessity of changing nozzles orportions thereof to meet changes in the demand of the steam boiler orother boiler with which the burner nozzle is employed.

A further object of the invention is to provide an improved,'automatically adjustable oil burner nozzle which is inexpensive tomanufacture, involves relatively few parts, is rugged in construction,and provides a wide range of orifice adjustment responding automaticallyto changes in the pressure of the oil vsupplied to the nozzle.

Further objects and advantages of the invention will become apparentfrom the following description and claim,l andfrom'the accompanyingdrawings, wherein:

Figure 1 is a side elevationalv view, partly in longitudinal,'cross-section',A of an improved, automaticail'y adjustable l oilwburnernozzle constructed in accordance with the present invention; f l

Figure 2 is an enlarged,cross-sectional View taken on linev 12T-LofFigure 1;

Figure., 3 is a cross-,setionalview taken on line 3 3 of Figure l;

Figure 4 is an enlarged, cross-sectional View taken on line 4--4 ofFigure 1;

Figure 5 is an enlarged, cross-sectional view taken on line 5 5 ofFigure 1;

Figure 6 is an enlarged, cross-sectional view taken on line 6-6 ofFigure 1.

Referring to the drawings, II designates an elongated, tubular barrelformed at its forward end with a reduced, threaded portion I2. Threadedon portion I2 is a sleeve member I3 formed at its forward end with areduced, threaded portion I4. lThreaded on portion I4 is the apertureddischarge cap I5. Cap |5 is formed at its central portion with thetapered orifice I6 which has a flared inner portion Sleeve member I3 isformed with a conical recess |8 communicating with the end of the sleeveby passages I9, I9. Tangential whirl ports 2|) are formed in the innerwall surface of the discharge cap l5, providing passages between thetapered portion ll and the passages I9.

Threaded into the rear end of the barrel Il is an oil supply tting 2|formed with an oil inlet conduit 22 and having secured in its maincavity a cylindrical strainer 23. The strainer 23 has apertured endwalls 24, 25 which are sealingly secured to the internal wall surfacesof the main body portion of the fitting 2|. The strainer end walls 24and 25 are formed with apertures, such as shown at 26 in Figure 4.Threadedly secured on the rear end of the fitting 2| is a shouldered,hollow cylindrical member 2l having a forward wall element 28 formedwith apertures 29, 29communicating with the space rearwardly adjacentthe apertured end wall 25 of the strainer 23. Sealingly secured to thewall 28 inside member 2`| is an expansible resilient bellows member 3Dhaving an inherent bias in a direction toward said wall. Designated at3| is a rod member which extends axially through the barrel II, thestrainer member 23 and wall element 23, and is secured at its rear endto the rear wall of the bellows 3D. The rear end portion of the rod 3|preferably is threadedly engaged in the rear wall of the bellows and islocked in adjusted position by a lock nut 32. Encircling the rod member3| inside the bellows 3|) is a coil spring 33 which bears between thewall 28 and the rear wall of the bellows, biasing the rod member 3|rearwardly. The forward portion of the rod member 3| extends slidablythrough the reduced forward portion I4 of the sleeve I3, the forward endof the rod 3| being tapered and engaging within the aperture I6 in thedischarge tip I5, as shown in Figure l. The rod member 3| extendsslidably through wall 28 and slidably and sealingly through the endwalls 2t and 25 of the strainer 23. The rear end of the rod member 3| isprovided with a slotted head 3d which may be engaged by the blade of ascrew driver or other similar tool for adjusting the position of the rodmember. The member 28 is provided with a removable rear cap wherebyaccess to the slotted end 34 of the rod member 3| is available wheneverrequired.

In operation, oil enters the inlet conduit 22 and then passes throughthe strainer 23 and the apertured forward end wall 24 thereof, passingthrough the barrel |I, the recess I8, the passages I9, the grooves 20,and past the end of the rod member 3| through the aperture I6,discharging from the tip I5 in an atomized condition. The rate ofdischarge is governed by the position of the tapered forward tip of therod member 3|. Oil also passes rearwardly through the apertured wall 25of the strainer 23 and through the openings 29, 29 into the bellows 30,extending the bellows 30 rearwardly in accordance with the 3 pressure ofthe oil. The normal position of the rear wall of the bellows 30 isestablished by spring 33, which also establishes the normal clearancebetween the forward end of rod member 3l and the discharge opening inthe tip l5. Rearward extension of the bellows 30 under the pressure ofoil admitted into the bellows moves the rod member 3| rearwardly,enlarging the discharge passage between the forward end of the rodmember and the discharge opening in the tip l5, whereby when the oilpressure is high, a relatively high rate of discharge of the atomizedoil is obtained. When the pressure of the oil admitted into the inletconduit 22 is small, the bellows 3U is in'a relatively contractedcondition, whereby the discharge passage at the tip I5 isrelativelysmall and therefore the discharge rate of the atomized oil issimilarly small. It will be therefore apparent that the discharge rateof the atomized oil at the burner tip is governed substantially inaccordance with the value of the pressure of the oil furnished at theintake conduit 22. Automatic regulation of the discharge rate of theatomized oil is therefore obtained in accordance with the pressure ofthe oil furnished to lthe burner device. This enables the burner deviceto be employed over a wide range of different inlet oil pressures andautomatically varies the rate of discharge of the atomized oil withoutthe necessity of changing the sprayer tip whenever changes in demand ofthe steam boiler or other device employing the burner occur. The devicefunctions to provide proper atomization of the oil over a wide range ofdemand conditions and prevents-waste of oil, and also preventsinefficient combustion thereof. The device is especially applicable foruse on marine vessels, such as warships and the like, wherein aconsiderable amount of rapid maneuvering is required. The use of thepresent device eliminates waste of time previously consumed in changingburners and enables a steady steam pressure to be obtained at all times,since the burners respond'automatically to provide proper atomizationandfeeding of the fuel under all conditions of fuel supply pressure.

While a specic embodiment of an improved automatically self adjustingoil burner device has been disclosed in theV foregoing description, itwill be understood Athat 'various modicationswithin the spirit of 'the'invention may occur `to those .ment in closing engagement with the rearend of the barrel, said wall element slidably receiving said rod andhaving an aperture therethrough, means removably closing the open end ofthe Ahollow cylindrical member, an expansible bellows secured to saidforward wall element rearwardly thereof and communicating with saidaperture, the rear portion of said valve rod being secured tothe endwall of the bellows said bellows having an inherent bias in a directionto close the valve, spring means biasing the valve rod rearwardly toestablish a normal amount of fuel discharge clearance at the burner tip,and a fuel inlet conduit connected to said space, whereby fuel may passthrough said strainer both forwardly and rearwardly in the barrel, saidbellows being expansible to retract said rod responsive to increase inpressure of the fuel, whereby the fuel discharge opening at the burnertip is enlarged.

HERBERT J. HABERSTROH.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date Re. 20,027 Wettstein June 30,1936 1,814,443 Goldberg July 14, 1931 2,391,808 Vincent Dec. 25, 19452,414,544 Moore Jan. 21, 1947 2,416,685 Fletcher Mar. 4, 1947 FOREIGNPATENTS Number Country Date 97,829 Austria Sept. 10, 1924 488,937Germany Jan. 9, 1930 577,176 Great Britain May 8, 1946

